Eliwell EWHT 1800LX, Manual

Page: 46 / 142

13
13 13
13 PRESSURE
PRESSURE PRESSURE
PRESSURE SWITCH
SWITCH SWITCH
SWITCH AND
AND AND
AND PREHEATING
PREHEATING PREHEATING
PREHEATING
Pressure
Pressure Pressure
Pressure switch
switch switch
switch input
input input
input regulator
regulator regulator
regulator
This regulator performs diagnostic operations over a digital input associated via a configuration table. It is activated by
setting parameters
•
1159:
1159: 1159:
1159: H11..1162:
H11..1162: H11..1162:
H11..1162: H14
H14 H14
H14
= 11 (general pressure switch),
• 1159: 1159: 1159: 1159: H11..1162: H11..1162: H11..1162: H11..1162: H14 H14 H14 H14 =9 (low pressure switch) or
• 1159:
1159: 1159:
1159: H11..1162:
H11..1162: H11..1162:
H11..1162: H14
H14 H14
H14 =10 (high pressure switch).
If a pressure switch input is activated, power to the compressor is immediately cut off, the relative alarm LED lights up to
indicate this visually and the following labels in the alarms folder are also displayed:
• PA 1, 2, 3... (up to the value set in parameter 1115: 1115: 1115: 1115: PEn PEn PEn PEn ) if
1159:
1159: 1159:
1159: H11..1162:
H11..1162: H11..1162:
H11..1162: H14
H14 H14
H14
=11 for the general pressure
switch
• HPA 1, 2, 3... (up to the value set in parameter 1115:
1115: 1115:
1115: PEn
PEn PEn
PEn ) if 1159:
1159:
1159: 1159: H11..1162:
H11..1162:
H11..1162: H11..1162: H14
H14
H14 H14 =10 for the high pressure
switch
• LPA 1, 2, 3... (up to the value set in parameter 1115: 1115: 1115: 1115: PEn PEn PEn PEn ) if
1159:
1159: 1159:
1159: H11..1162:
H11..1162: H11..1162:
H11..1162: H14
H14 H14
H14
=9 for the low pressure switch
Regulation is provided via the configuration of two parameters : 1115: 1115: 1115: 1115: PEn PEn PEn PEn and 1116: 1116: 1116: 1116: PEI PEI PEI PEI :
An alarm is generated only if the maximum number of signals is reached before the time set in parameter 1116: 1116: 1116: 1116: PEI PEI PEI PEI
elapses. The time 1116:
1116:
1116: 1116: PEI
PEI
PEI PEI is counted down from the first signal.
If the number of activations exceeds the number set in 1115: 1115: 1115: 1115: PEn PEn PEn PEn within the time limit 1116: 1116: 1116: 1116: PEI PEI PEI PEI , the following events
occur:
•
•
•
The compressor , fans and defrost are disabled
The label PA, HPA or LPA + activation # (depending on whether it relates to the general, high or low pressure
switch or
1159: 1159: 1159: 1159: H11..1162: H11..1162: H11..1162: H11..1162: H14 H14 H14 H14 = 11, 9 or 10) appears in the alarm folder .
The alarm relay comes on (if configured).
If the number of activations exceeds the number set in 1115: 1115: 1115: 1115: PEn PEn PEn PEn within the time limit 1116: 1116: 1116: 1116: PEI PEI PEI PEI , the alarm is
automatically reset.
N.B: Once the controller is in alarm state, it must be powered off then on, or reset by activating parameter rAP from the
function menu . Pressure switch alarms can be reset via function rPA in folder FnC.
N.B: If parameter 1115: 1115: 1115: 1115: PEn PEn PEn PEn is set to O, the function is excluded and alarms and counters are also disabled.
Preheat Preheat Preheat Preheat Input Input Input Input Regulator Regulator Regulator Regulator
The digital input configured as Preheat ( 1159: 1159: 1159: 1159: H11..1162: H11..1162: H11..1162: H11..1162: H14 H14 H14 H14 =12) disables compressor and fan outputs.
When the preheat input is activated, this is not indicated on the
display
but in the
Alarms folder
EWHT 1800LX
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